EAPSI: Improving models of agricultural greenhouse gas emissions by mapping soil moisture variability with near-surface geophysics

温室气体，如甲烷，从农田以不同的速率排放，部分取决于农田的土壤水分含量(SWC)。SWC的可变性地图可以作为气候模型的输入，提高我们对农业活动如何影响大气的理解。这项研究将使用近地表地球物理方法来探测农田地下水量的变化。拟议的项目将在昆士兰科技大学与雷姆克·范·达姆博士合作进行。该项目将利用澳大利亚布里斯班昆士兰科技大学健康生态系统和环境监测(HeEM)小组在这一领域正在进行的研究。与支持水文和环境研究的合作将有助于推动这一项目和现有项目。温室气体排放对气候变化具有重要影响，已被证明受到SWC变化的影响，但传统的确定SWC的方法，如TDR，不容易涵盖实地或更大规模。探地雷达地波通过很浅的地下从发射天线传播到接收天线，提供了一种相对快速地创建现场SWC变化的现场尺度图的方法。所得到的地图可用作温室气体排放模型的输入，从而允许将点测量扩大到现场尺度。将在进行中的温室气体排放研究项目的实地地点进行探地雷达反射调查。该NSF EAPSI奖是与澳大利亚科学院合作资助的。

Greenhouse gasses, such as methane are emitted from agricultural, fields at varying rates, based in part on the soil water content (SWC) of the fields. A map of the variability in SWC can be used as an input for climate models, improving our understanding of how agricultural activity affects the atmosphere. This research will use near-surface geophysical methods to detect changes in the amount of water present in the subsurface of agricultural fields. The proposed project will take place at Queensland University of Technology in collaboration with Dr. Remke Van Dam. The project will take advantage of the ongoing research that has been done in this area by the Healthy Ecosystems and Environmental Monitoring (HEEM) team at the Queensland University of Technology in Brisbane, Australia. Collaboration with supporting hydrologic and environmental research will help advance both this project and the existing projects.GHG emissions, which have important implications for climate change, have been shown to be affected by variability in SWC, but traditional methods of determining SWC such as TDR do not easily cover the field scale or larger scales. The GPR ground wave, which travels from the transmitting antenna to the receiving antenna through the very shallow subsurface, provides a way to, relatively quickly; create a field-scale map of the SWC variations at a field site. The resulting map can be used as an input for models of GHG emissions, allowing for upscaling of point measurements to the field scale. GPR reflection surveys will be carried out at field sites with ongoing GHG emission research projects. This NSF EAPSI award is funded in collaboration with the Australian Academy of Science.